Data Fusion based on Game Theory for Speaker Diarization

A novel algorithm based on bimatrix game theory has been developed to improve the accuracy and reliability of a speaker diarization system. This algorithm fuses the output data of two open-source speaker diarization programs, LIUM and SHoUT, taking advantage of the best properties of each one. The performance of this new system has been tested by means of audio streams from several movies. From preliminary results on fragments of five movies, improvements of 63% in false alarms and missed speech mistakes have been achieved with respect to LIUM and SHoUT systems working alone. Moreover, we also improve in a 20% the number of recognized speakers, getting close to the real number of speakers in the audio strea

Social and content hybrid image recommender system for mobile social networks

One of the advantages of social networks is the possibility to socialize and personalize the content created or shared by the users. In mobile social networks, where the devices have limited capabilities in terms of screen size and computing power, Multimedia Recommender Systems help to present the most relevant content to the users, depending on their tastes, relationships and profile. Previous recommender systems are not able to cope with the uncertainty of automated tagging and are knowledge domain dependant. In addition, the instantiation of a recommender in this domain should cope with problems arising from the collaborative filtering inherent nature (cold start, banana problem, large number of users to run, etc.). The solution presented in this paper addresses the abovementioned problems by proposing a hybrid image recommender system, which combines collaborative filtering (social techniques) with content-based techniques, leaving the user the liberty to give these processes a personal weight. It takes into account aesthetics and the formal characteristics of the images to overcome the problems of current techniques, improving the performance of existing systems to create a mobile social networks recommender with a high degree of adaptation to any kind of user

Integrated Modelling of Business Processes and Communication Events for Public Transport

In this paper, a generic communication system, which is controlled by a formalized process model is proposed and instantiated for the public transport domain. The operation of this system combines a distributed work-flow model (Business Process Modelling Notation, BPMN) with open communication standards such as real time communication (RTC) characteristics as provided by e.g. LTE mobile IP networks. The performed formalization meets the requirements of a typical scenario in public transport: connection protection. The participants involved are represented by control centers, along with the vehicle users: driver and passengers. Formalization with BPMN allows the modelling and understanding of the different interactions and communications between the different agents. For public transport operators the approach set out in this paper leads to a considerable advantage regarding economic requirements

Integration individuell abrufbarer Personentransportsysteme in den ÖPNV

Unternehmen des öffentlichen Personennahverkehrs (ÖPNV) streben einen Betrieb an, der wirtschaftlich, sicher und für die Fahrgäste attraktiv ist. Neben einer ausreichenden räumlichen und zeitlichen Bedienung mit Verkehrsleistungen umfasst dies weitere Komfortmerkmale. Die Bereitstellung aktueller betrieblicher Informationen für alle im Sinne kollektiver Auskunftsmedien ist seit langer Zeit im Betrieb von ÖPNV-Systemen erfolgreiche etabliert. In der zunehmenden Verfügbarkeit des mobilen Internets und einer entsprechenden Ausstattungs-rate der Fahrgäste mit Smartphones besteht jedoch das Potenzial, neben der Bereitstellung von Echtzeitinformation auch Anwendungsprogramme (Apps) zur Assistenz der Reisenden bei verkehrsträgerübergreifenden Reiseketten zu entwickeln und bereitzustellen. Parallel hierzu zeichnet sich eine sukzessive Zunahme der Fahrzeugautomation ab. Am Ende dieser Entwicklung wird das autonome Fahrzeug stehen. Auf dieser technologischen Grundlage werden bedarfsorientierte Bedienformen in Form individuell abrufbarer Transportsysteme in städtischen Quartieren langfristig umsetzbar. Dieser Beitrag beschreibt, wie individuell abrufbare Transportsysteme auf Basis autonom fahrender Fahrzeuge in die Informationsdienste des ÖPNV integriert werden können

Von der Information der Fahrgäste zur Interaktion mit den Fahrgästen – Potenziale formalisierter Geschäftsprozesse im ÖPNV am Beispiel der Anschlusssicherung

Die Bereitstellung eines effizienten und aus Sicht der Fahrgäste attraktiven öffentlichen Personennahverkehrs bedarf eines aufeinander abgestimmten Zusammenwirkens von Akteuren in den Leitstellen der beteiligten Verkehrsunternehmen und des beteiligten mobilen Betriebspersonals. Hierfür sind in einem stark räumlich verteilten verkehrstechnischen System viele interaktive Prozesse zu gestalten. Diese umfassen einerseits die Bedienung komplexer leittechnischer Systeme durch das Personal der Leitstelle sowie die Integration zusätzlicher betrieblicher Informationen in die ohnehin schon anspruchsvolle Fahraufgabe des Fahrers. Andererseits treten in interaktive Prozesse auch bei maschinell unterstützten Dialogen sowohl innerhalb des Verkehrsunternehmens (zwischen mobilem Betriebspersonal und der Leitstelle) als auch an der Schnittstelle zum Kunden auf. Für die Gestaltung dieser Interaktionsbeziehungen in einem hochgradig räumlich verteilten System ist eine geeignete Informations- und Kommunikationsinfrastruktur unerlässlich. Dieser Beitrag stellt eine auf offenen Standards basierende Kommunikationsarchitektur für Anwendungen im ÖPNV vor. In den Anwendungen werden verteilte Geschäftsprozesse und Kommunikationsereignisse integriert modelliert. Die in diesem Beitrag vorgestellten Konzepte werden am Beispiel des verteilten Prozesses der Anschlusssicherung im ÖPNV erläutert

Integrierte Modellierung von Geschäftsprozessen und Kommunikationsereignissen im ÖPNV

Die Kommunikation zwischen Leitstelle und Fahrzeugen und Fahrzeugen untereinander ist für den effizienten Betrieb des öffentlichen Personennahverkehrs (ÖPNV) zentral. Dieser Beitrag stellt eine auf offenen Standards basierende Kommunikationsarchitektur für Anwendungen im ÖPNV vor. In den Anwendungen werden verteilte Geschäftsprozesse und Kommunikationsereignisse integriert modelliert

Integrated Modelling of Business Processes and Real Time Communication for Public Transport

This paper proposes a generic communication system, which is controlled by a formalized process model. This system architecture is instantiated for the public transport domain. The operation of this system combines a distributed work-flow model (Business Process Modell and Notation, BPMN) with open communication standards incorporating real time communication (RTC) characteristics as provided by e.g. LTE mobile IP networks. The performed formalization meets the requirements of a typical scenario in public transport: connection protection. The participants involved are represented by the control center, along with the mobile and distributed users: drivers and passengers. Formalization with BPMN allows the modelling and understanding of the various interactions and communications between the different agents. For public transport operators the approach set out in this paper leads to a considerable economic advantage. Passengers benefit from improved customer experience in seamless travel across different modes of transportation

Development of a Demand Responsive Transport system with improvement analysis on conventional public transport: A Case Study for Schorndorf, Germany

Demand Responsive Transport (DRT) is a passenger-oriented branch of public transport, which consists of a group of passengers sharing a vehicle with flexible pick-up and drop-off locations and times, according to the passenger preferences. This kind of systems represents a well-known solution for providing public transport services in areas of low demand. However, DRT systems are most of the time economically unfeasible, due to the difficulties on balancing costs and demand. In a very small city, DRT systems are highly valued by the passengers, but too expensive, due to the low demand. On the contrary, these systems are overload in a big city, and become thus unappealing to passengers. The purpose of this work is to develop an evaluation tool in order to correctly establish the viability of the implementation of a DRT system

Systematic improvement of customer satisfaction for passengers with special mobility needs

Public transport operators have to focus on a public transport system, which is inclusive and fair to all groups of society. This requires a new holistic approach reflecting the user and the service provider perspectives. The overall objective is an unrestricted use of a fully integrated cross modal public transportation along the complete mobility chain. Unrestricted use of the public transport system can be facilitated with travel assistance applications for smartphones. In addition to this every mobility-chain needs to be accompanied by an information chain. The information provided needs to be up to date, relevant to the specific context of the user, correct and understandable. This paper presents the innovative concept of the transnational project “accessible and inclusive mobility for all with individual travel assistance” (aim4it). The project aims towards a holistic travel companion design, which provides value-added services for passenger with special mobility needs. The assistance functions are accompanied by suitable evaluation algorithms for customer feedback. An innovative systematic evaluation of customer feedback allows for continuous improvement activities of the public transport operators. Results of the project will be practically demonstrated in close cooperation with the local public transport operators in the cities of Vienna (Austria) and Karlsruhe (Germany)